Apparatus for producing reinforced pulp-board.



' W. W; CLARK.

RO DUGING REINFORCED PU APPLICATION FILED FEB. 5, 1907.

LP BOARD.

APPARATUS FOR P Patented May 18, 1909.

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W. W. CLARK. APPARATUS FOR PRODUCING REINFORCED PULP BOARD. APPLICATIONFILED FEB. 5, 1907.

Patented May 18, 1909.

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v II W. W. CLARK.

ODUOING REINFORCED PULP BOARD; APPLICATION FILED FEB. 5,

APPARATUS FOR PR Patented May 18, 1909.

' neapolis, in the county ofl-lennepin and the left, are similar rollersorcylindcrs 4, the

bearings in the sides of the frame 1. The

UNITED sTATnsPATENT OFFICE.

WILLIAM W. CLARK, OF MINNEAPOLIS, MINNESOTA.

APPARATUS FOR PRODUCING REINFORCED PULP-BOARD.

Specification of Letters Patent.

Patented May 18, 1909.

Application filed February 5, 1907. Serial No. 355,803.

To all whom it may concern: Be it known that 1, WILLIAM W. CLARK, acitizen of the United States, residing at Min-. 1 1

State of Minnesota, have invented certain l new and useful Improvementsin Apparatus for Producing Reinforced Pulp-Board and I do hereby declarethe followin to be a full, clear, and exact description of theinvention,

such as will enable others skillod in the art to which it appertains tomake and use thel same.

My present invention has for its object .to provide .a simple processand apparatus or machine for producing reinforced pulp board, l and tothis end it consists of the novel steps of treatment and the noveldevices and combinations of devices hereinafter described and defined inthe claim.

An apparatus of novel construction for carrying out the novel processherein disl closed and claimed is illustrated in the accompanyingdrawings, wherein like characters indicate like parts throughout thesolveral views.

Referring to the drawings, Figure 1 is a plan view of the improvedapparatus or machine, some parts being broken away. Fig. 2 is a sideelevation of the improved ap tus or machine; and Fig. 3 is a verticaftion taken through the machine on x m of Fig. 1f

This improved process is a continuous l process in which wood pulp issimultaneously applied to opposite sides of a reticulate woven wirereinforcement, and is pressed together so as to unite the fibers throughthe interstices or openings in the metallic reinforcement. The pulp,after it has been applied to the opposite faces of the woven wirereinforcement and pressed together, is further and successivelycompressed until it is brought to the proper compactness and thickness.

The machine involves a suitable framework indicated by the numeral 1. Insuitable bearings in the sides of the frame 1, the l shafts of bedforming rollers 2, 3 and 3 are journaled. The rollers 2 arecomparatively large and are preferably in the form of hollow cylinders.Directly overlying but spaced above the three large rollers or cylinders2 at shafts of which are also journaled in suitable l strata of thepulp. l by the character 2.

three pairs of cylinders 2-4 at the left constit-ute the compressionmembers, and the. said pairs are spaced closer and closer together,successively from the right toward the left. As shown, the shafts ofsaid upper cylinders 4 are journaled in adjustable bearing boxes 5mounted in suitable seats in the frame 1, and subject to adjustingscrews 6, so that the spacing of the cooperating members of the pairs ofcompression cylinders or rollers may be varied at will.

An endless rcticulate carrier belt 7 runs over the bed rollers 2, 3 and3. Above that portion of the belt 7 which runs upon the rollers 3 is apair of pul supplying ioppers 89, both of which, as sliown, are soported from the frame 1 by brackets 10. oosely journaled on the upperportions of the brackets 10 between the hoppers 8 and 9 is a spin dle11. upon which is wound a roll of woven wire fabric 12 which is toconstitute the metal reinforcement to the pulp board.

Extending longitudinally of the machine,

' at the ends of the upper cylinders 4, is a pair of gage plates 13which, asshown, are secured to the sides of the frame 1 by adjustablebrackets 14. Journaled in these gage plates 13 there is, as shown, apair of small rollers 15 located between the upper cylinders 4 andcooperating with the small the board. The spacing of the pairs ofrollers 3 15 must, of course, correspond approximately to the spacing ofthe cylinders 2-4 at the right thereof with respect to Fig. 3. Alsojournaled in the gage plates 13 is an idle wire guiding roller 16 thatis preferably provided with projections adapted to pass through theopenings in the wire fabric to prevent slipping and to hold the fabricspread being fed between the upper and lower The pulp is indicated Anysuitable and well known means may be provided for positively driving thelower cylinders 2, or the lower cylinders 2 and upper cylinders 4,'sothat under the rotation thereof in the direction of the arrows markedthereon in Fig. 3, the pulp and the interposed wire fabric q will bepositively fed from the right toward the left with respect to Fig. 3,and preferably onto a receivin table 17. When the said rollers are thusriven, the carrier belt 7 will, of course, also be driven in thedirection of the line i underlying rollers 3 to prevent buckling of outto the proper width while it is air ers may be employed) the pulp willbe com pressed toits final density and thickness required in the boardwhich is being manuioosely andvwith 'slackbetween factured. Furthermore,under this compression, while the pulp ismoist, the fibers thereof willbe commingled through the tically integral.

ounted in suitable bearings on the table I 17, there is referably aroller 18 that is provided with aterally spaced trimmingdisks 1 9 kwhich cut the-edges off from the board which isforc'ed under the sameand over the table 1 7. Tosecure the best results, the wire fabric isembedded between the upper and lower portions of. the pulp board in theprocess formation while it is under initial tension; and to accomplishthis, means is shown as rovided for utting the spindle 11 under riction.As shown in Fig. 2, this frictional device is in the form of a set screw20 passed through one of the brackets 10 and impinging against and atthe end of said s indle. metallic reinforcement thus embedhed in theboard under initial tension will resist, in the first instance, even-theslightest strain upon the board, whereas a wire fabric 're fabric y, I

pulp will befrollers, a gui openings in the wire fabric, so that theupper and lower strata of the fabricbecomes pracembedded the parts,

Would resist such strains only after its wires have been drawn taut. v

To make board of different widths would, in the constructionillustratedrequire a sub stitution-of uppercylinders 4 and rollers 15 and 16 ofdifferent lengths and would require material to be compressed, of anendless reticulate carrier belt arranged to run between the u per and.lower com ression e arranged to direct t e reinforcing fabric betweensaid'upper and lower compressionrollers, means for delivering the pulpdirectly onto said carrier belt for appli-' cat1on to the lower face ofsaid reinforcing fabric, independent means v for deliveringpulp directlyonto the upper faceof said'-reinforcing fabric, and rigid guide rails arranged to confineand form the edges of the pulp body of said board,whereby the pulp app ied to the upper andlower faces of said reinforcingfabrlc will be successively com-f. pressed' to final compactness andthickness with a continuous-action, will be caused to unite between themeshes of said reinforcing .fabric, the surp lu s w ter will begradually 15 pressed from said pul and the pul body of the board will beformed with para el edges, substantially as described; v p Intestimonywhereof I affix my signature in presence of two-witnesses. p

. WILLIAM W. CLARK. Witnesses: MALIE Hoar,

' E. Di MERCHANT.

reinforced pulp

